Reciprocating guide head for yarn packaging device



Nov. 28, 1939. 2.181.,267

RECIPROCATING- GUIDE HEAD FOR YARN PACKAGING DEVICE w. J. ELYlN ET-ALOriginal Filed Aug. 50, 19:54

JEN.

JOSEPH L WSK WILLIAM J. ELVINAN BY W A ORNEYS.

Patented Nov. 28, 1939 i P TENT OFFICE RECIPROCATING GUIDE FOR YARNPACKAGING DEVICE William J. Elvin, Cumberland, Md., and Joseph 1 L.Killoran, Drummondville, Quebec, Canada, assignors to CelaneseCorporation of America,

a corporation of Delaware Original application August 30, 1934, SerialNo. 742,108, now Patent No. 2,048,787, dated July 28, 1936. Divided andthis application February 13, 1936, Serial No. 63,731

3 Claims.

This invention relates to a yarn packaging device and more particularlyto such a device that draws yarns from a package such as a bobbin,

imparts a twist to the yarn and winds the same 5 into a cross-woundpackage, such as a cheese. This invention relates particularly to thehead of such a device including the driving and other mechanism forwinding the yarn onto the crosswound package.

An object of the invention is a commercially practical device which willtwist and package fine filaments or yarns such that the resultingpackage may be large, say 1 lbs., firm, free from tendencies to fluff atthe ends and which is uniform in tension, without soft spots. Anotherobject of the invention is a device so designed that the package formedthereon is uniform throughout. Other objects of the invention willappear from the following detailed description and drawing.

This application is a division of our application S. No. 742,108, filedAugust 30, 1934, which has issued as Patent No. 2,048,787.

. In the drawing wherein like numbers refer to the same or equivalentelements,

Figure 1 is a perspective view of a reciprocating guide head showing thedriving means therefor,

Figure 2 is a side elevation in detail of the drive mechanism shown inFigure 1, and

Figure 3 is an end view partially in section taken on the line 88 .ofFigure 2. r

In the cross-winding of packages, such as cheeses, the yarn is guided tothe take-up package by means of a reciprocating guide member. This guidemember reciprocatingtransversely to the direction of rotation of thetake-up package directs the yarn or thread onto the package in a spiralform one end to the other and back. If the rate of reciprocation isconstant relative to the rate of rotation, the point of reverse of theyarn will fall in ever so many cycles on the point of reverse of aformer laid increment of yarn. In this manner a cross-wound package isformed the ends of which are not uniformly solid but contain hard spotswhere the points of reverse of the yarn are one above the other and softspots where the points of reverse of the yarn do not occur. Somepackages, depending upon the ratio of the traverse to the revolutions ofthe yarn, may contain the points of reverse in lines radiating from thecenter making a package very easily fluffed, i. e., increments of yarnforming arcs across the end of the package. These types of packagescannot be roughly handled nor even employed in certain types of textileoperations.

In employing the device forming this invention, however, the ratio ofthe reciprocation of the guide means is not constant in respect to therate, of rotation of the take-up packageand, therefore, the points ofreverse do not fallin limited areas on the end of the package but areevenly distributed throughout the area. This forms a solid package thatmay be shipped or. otherwise handled and applicable to textileoperations without fiufiing at the ends. This is accomplished not by aprogressive change in the ratio referred to, which would lead to thesame fault as a constant ratio, but by varying the ratio first to oneside and then the other of a mean ratio;

In accordance with our invention, we have devised a method and deviceforaccomplishing the same that winds yarns into cross-wound packages,which packages are solid and free from ununiform ends. This device isdesigned for use in connection with the complete winding and spinningdevice shown in Figure 1 of the parent case.

For guiding the thread onto the'take-up package 55 there is provided areciprocating guide member 2i that causes a cross-winding of the threadupon the package. It is desirable that the reciprocation, and thus thelaying on of the thread upon the package, have a mean speed which isconstant relative to the peripheral speed v of the take-up package, yeta speed that varies from faster to slower than the mean speed so thatthe points of reverse of the thread upon the package will not fall withtoo great a frequency upon the same or about the same axial line andresultin a package that has an ununiform end. This may be accomplishedby the driving means for the cam that governs the reciprocation of guide2|.

, The term yarn and thread are here used as substantially synonymous andmay include fibers or filaments of any suitable materials such asfilaments of organic derivatives of cellulose, regenerated orreconstituted cellulose, silk or mixtures of these or the yarns may beformed of fibers twisted or otherwise held together of cotton, wool,flax and the like.

In the drawing there is shown part of a device constructed in accordancewith our invention, which device employs a simpleform .of a drive forimparting a variable reciprocation to thread guides 2|. This drivedevice is adapted for use on automatic twisting devices and especiallyon the type shown in Figure 1 of the parent case. 5

From any suitable source, and preferably from a source connected withthe supply package drive mechanism, rotation is imparted to the shaft33, upon which is mounted a friction-roll 23 that supports and turns thetake-up package 55. The friction roll 23 may be of sufiicient length tosupport and rotate one or several take-up packages.

On shaft 33 is fastened a sprocket wheel M. Suitably journaled in themain frame is a shaft IIB lying parallel to and beneath shaft 33, saidshaft II6 having fastened thereto a sprocket wheel In that registerswith and is driven from sprocket wheel it by a sprocket chain Hi3, thusimparting a positive movement to shaft H6 in' timed relation to theperipheral speed of the take-up package 55.

Fastened on shaft M6 by means of a key H9 or other suitable means aretwo gears I28 and HI. Gear l2i! is slightly larger than gear IN.

A shaft 38 suitably journaled in a drum cam box that is a part of themain frame has fastened thereto a drum cam 81. The shaft 88 has mountedthereon and rotatable with respect thereto two gears 122 and W3 thatregister with and are driven from gears ill and lit, respectively. Thediameter of gear I23 is less than the diameter of gear I22 50 that inregistering with gears IEI and I20 the shafts H5 and 38 may besubstantially parallel.

Fastenedto or made a part of gear I22 is an elliptical gear I2eccentrically mounted on shaft 88. Gear 523 is formed with a bearingmember I25 in which is mounted a shaft S26 adapted to rotate therein.The shaft 25 has fastened thereto as by a key I2? or made integraltherewith an elliptical gear 428 mounted eccentrically of shaft I26 andin registry with and driving relation to elliptical gear ltd. On theopposite end of shaft I26 is a gear 529 fastened thereto by means of akey or other suitable means.

Keyed to, Or otherwise suitably fastened in driving relation to shaft 88is a gear I30 that registers with and is in driving relation to gear I29on shaft H6. The gear i353 imparts rotation to shaft 88 which in turnrotates drum cam 8?. On drum cam Sl there are two cam ways Q2 and 93 inthe latter of which a roller pin Si is adapted to be guided. Pin 95 issuitably fastened to a slide head ti; that is fastened by adjustable rod96 to the reciprocating thread guide holder rod 89.

The action of the drive mechanism is as follows: Shaft I56 is driven bysprocket chain H3 from the friction roller drive shaft 33. The two gearwheels I22 and I23 then rotate at slightly different speeds so thatthere is a relative motion between them to give one relative revolutionfor each complete cycle of traverse variation. The major and minor axesof the elliptical wheels may be chosen to give the required variation oftraverse on either side of the mean speed. elliptical wheel 28 will onerevolution for each revolution of the wheel 122 relative to the wheeli23. Since the wheels 28 and I29 are both positively fastened to thesame shaft, it follows that the wheel I30 must make one revolutionrelative to the wheel I23 for each relative revolution of the wheel I22,but since the wheel Itt gets this motion through the elliptical pair ofwheels, its speed will not be uniform. The net result is to superimposea variable velocity onto the The uniform velocity of revolutiontransmitted to the wheel 523. The mean Velocity of revolution of theshaft 88 and the cam drum 81 will be the same as that of the wheel I22,but there will be a slow relative backward and forward movement of theshaft 88 with relation to the wheel I23.

It is to be understood that the foregoing detailed description is givenmerely by way of illustration and that many variations may be madetherein without departing from the spirit of our invention.

Having described our invention, what we desire to secure by LettersPatent is:

1. In a machine for producing cross-wound packages of yarn, thecombination with means for winding the yarn on the package at a constantspeed, of means for traversing the yarn on the package comprising ashaft, a drum cam mounted on said shaft, a traverse guide rod adapted tobe reciprocated by said drum cam, a second shaft driven through saidwinding means, a plurality of gears attached to said second shaft,floating gears supported on the drum cam shaft and adapted to mesh withthe gears on said second shaft, and eccentrically mounted ellipticalgears attached to said floating gears, said eccentrically mountedelliptical gears being adapted to rotate the drum cam, the constructionand arrangement being such that the drum cam reciprocates the traverseguide rod at a variable speed.

2. In a machine for producing cross-wound packages of yarn, thecombination with means for Winding the yarn on the package at a constantspeed, of means for traversing the yarn on the package comprising ashaft, a drum cam mounted on said shaft, a traverse guide rod adapted tobe reciprocated by said drum cam, a second shaft driven through saidWinding means, a plurality of gears of different diameter attached tosaid second shaft, floating gears of different diameter supported on thedrum cam shaft and adapted to mesh with the gears on said second shaft,and eccentrically mounted elliptical gears attached to said floatinggears, said eccentrically mounted elliptical gears being adapted torotate the drum cam, the construction and arrangement being such thatthe drum cam reciprocates the traverse guide rod at a variable speed.

3.1n a machine for producing cross-wound packages of yarn, thecombination with means for winding the yarn on the package at a constantspeed, of means for traversing the yarn on the package comprising ashaft, a drum cam mounted on said shaft, a traverse guide rod.

adapted to be reciprocated by said drum cam, a second shaft driventhrough said winding means, a plurality of gears attached to said secondshaft, floating gears supported on the drum cam shaft and adapted tomesh with the gears on said second shaft, eccentrically mountedelliptical gears attached to said floating gears, and a gear attached tosaid cam shaft, said elliptical gears being adapted to rotate the drumcam through the said gear attached to said drumcam shaft, theconstruction and arrangement being such that the drum cam reciprocatesthe traverse guide rod at a variable speed.

l/VILLIAM J. ELVIN.

JOSEPH L. KILLORAN.

